let formatError = (ctx, err, costTime) => {
  let method = ctx.method
  let url = ctx.url
  let body = ctx.request.body
  // let userAgent = ctx.header.userAgent
  return {method, url, body, costTime, err}
}
let formatRes = (ctx, costTime) => {
  let method = ctx.method
  let url = ctx.url
  let body = ctx.request.body
  let response = ctx.response
  return {method, url, body, costTime, response}
}
module.exports = {formatError, formatRes}